Patent US2370476A successfully refreshed from Google Patents.
Patent US5276351A successfully refreshed from Google Patents.
US5276351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic device and a manufacturing method for the same
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1992-02-13
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Granted: 1994-01-04
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Expires: 2012-02-13
Abstract
Abstract A method for manufacturing a lead frame comprises the steps of covering, with a cover film, a die to which an electronic device is attached and a conducting section of a lead section to be electrically connected to the die, covering the whole of the die and lead section and the cover film with an inorganic protective film, and removing the cover film and the protective film formed over the cover film to partly expose the die and the conducting section for electric connection.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Yasuhiko Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/411; H10W70/456; H10W70/458; H10W72/00; H10W72/071; H10W72/073; H10W72/07351; H10W72/07352; H10W72/30; H10W72/321; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/59; H10W72/851; H10W72/874; H10W72/884; H10W72/90; H10W72/951; H10W72/952; H10W74/00; H10W90/00; H10W90/701; H10W90/731; H10W90/736; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
An electronic device comprising: a package; a lead frame partially enclosed in said package; a device part enclosed in said package; and means for electrically connecting said device part and said lead frame, wherein said lead frame is coated with a protective film except for a portion of electric contacts of said lead frame.
Claim 2
Dependent Claim
54 words
An electronic device comprising: a package; a lead frame partially enclosed in said package; a device part enclosed in said package; and means for electrically connecting said device part and said lead frame, wherein said lead frame is coated with a protective film except for a portion of electric contacts of said lead frame.
Claim 3
Dependent Claim
35 words
The device of claim 1 wherein said connecting means comprises a wire connected with said lead frame at one end of said wire and with said device part at the other end of said wire.
Claim 4
Dependent Claim
10 words
The device of claim 2 wherein said wire comprises gold.
Claim 5
Dependent Claim
14 words
The device of claim 2 wherein said lead frame extends above said device part.
Claim 6
Dependent Claim
22 words
The device of claim 4 wherein said wire is connected with said lead frame at said one end above said device part.
Claim 7
Dependent Claim
14 words
The device of claim 1 wherein said device part is an integrated circuit chip.
Claim 8
Dependent Claim
12 words
The device of claim 1 wherein said package comprises an organic resin.
Claim 9
Dependent Claim
22 words
The device of claim 1 wherein said lead frame comprises a material selected from the group consisting of copper and 42 ALLOY.
Claim 10
Dependent Claim
26 words
The device of claim 1 wherein said protective film comprises a material selected from the group consisting of silicon oxide, silicon nitride, silicon carbide and carbon.
Claim 11
Dependent Claim
14 words
The device of claim 1 wherein said protective film is provided in said package.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |